package me.wlz.config;

import lombok.AllArgsConstructor;
import org.springframework.cloud.gateway.config.GatewayProperties;
import org.springframework.cloud.gateway.route.RouteLocator;
import org.springframework.cloud.gateway.support.NameUtils;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import springfox.documentation.swagger.web.SwaggerResource;
import springfox.documentation.swagger.web.SwaggerResourcesProvider;

import java.util.ArrayList;
import java.util.List;

@Configuration
@Primary
@AllArgsConstructor
public class SwaggerConfig implements SwaggerResourcesProvider {

    /**
     *  网关路由信息
     */
    private final RouteLocator routeLocator;

    /**
     *  网关配置信息
     */
    private final GatewayProperties gatewayProperties;


    @Override
    public List<SwaggerResource> get() {
        List<SwaggerResource> resources = new ArrayList<>();
        List<String> routes = new ArrayList<>();
        // 获取路由
        routeLocator.getRoutes().subscribe(route -> routes.add(route.getId()));
        gatewayProperties.getRoutes().stream().filter(routeDefinition -> routes.contains(routeDefinition.getId())).forEach(route -> {
            route.getPredicates().stream()
        .filter(predicateDefinition -> ("Path").equalsIgnoreCase(predicateDefinition.getName()))
        .forEach(predicateDefinition -> resources.add(swaggerResource(route.getId(),predicateDefinition.getArgs().get(NameUtils.GENERATED_NAME_PREFIX + "0")
                .replace("**", "v2/api-docs"))));

        });
        return resources;
    }

    private SwaggerResource swaggerResource(String name, String location) {
        SwaggerResource swaggerResource = new SwaggerResource();
        swaggerResource.setName(name);
        swaggerResource.setLocation(location);
        swaggerResource.setSwaggerVersion("2.0");
        return swaggerResource;
    }


}
